// import { computed, onUnmounted, ref } from "vue";
// import dayjs from "dayjs";
// export const timedown = () => {
//   let timer = null;
//   const times = ref(0);
//   const format = computed(() => {
//     dayjs.unix(times.value).format("mm分ss秒");
//   });
//   const start = (current) => {
//     times.value = current;
//     timer = setInterval(() => {
//       times.value--;
//     }, 1000);
//   };
//   onUnmounted(() => {
//     timer && clearInterval(timer);
//   });
//   return {
//     start,
//     format,
//   };
// };
// 封装倒计时逻辑函数
import { computed, onUnmounted, ref } from "vue";
import dayjs from "dayjs";
export const useCountDown = () => {
  // 1. 响应式的数据
  let timer = null;
  const time = ref(0);
  // 格式化时间 为 xx分xx秒
  const formatTime = computed(() => dayjs.unix(time.value).format("mm分ss秒"));
  // 2. 开启倒计时的函数
  const start = (currentTime) => {
    // 开始倒计时的逻辑
    // 核心逻辑的编写：每隔1s就减一
    time.value = currentTime;
    timer = setInterval(() => {
      time.value--;
    }, 1000);
  };
  // 组件销毁时清除定时器
  onUnmounted(() => {
    timer && clearInterval(timer);
  });
  return {
    formatTime,
    start,
  };
};
